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Environmental Issues

Water Pollution Practice Questions

20 free Water Pollution practice questions for the NCERT Biology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.

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All Water Pollution questions

20 questions
  1. Q1. Which of the following is considered the primary cause of cultural eutrophication in water bodies?
  2. Q2. Biochemical Oxygen Demand (BOD) is a measure of:
  3. Q3. In a polluted river, which of the following changes is observed at the point of sewage discharge?
  4. Q4. The phenomenon of biological magnification refers to the:
  5. Q5. According to the NCERT, what is the concentration of DDT found in fish-eating birds if the water contains 0.003 ppb of DDT?
  6. Q6. High concentrations of DDT in birds interfere with calcium metabolism, leading to:
  7. Q7. The 'Terror of Bengal' is an invasive aquatic weed known as:
  8. Q8. Which method is specifically used for the remediation of heavy metal pollution in water by using plants?
  9. Q9. What percentage of impurities makes domestic sewage unfit for human use?
  10. Q10. Thermal wastewater discharge into water bodies primarily affects the ecosystem by:
  11. Q11. Which of the following is a result of the excessive growth of planktonic algae in a water body?
  12. Q12. The ‘Arcata Marsh’ project in California is a famous example of:
  13. Q13. What is 'EcoSan' as mentioned in the context of environmental issues?
  14. Q14. Minamata disease was caused by the consumption of fish contaminated with:
  15. Q15. The Water (Prevention and Control of Pollution) Act was passed by the Government of India in:
  16. Q16. Polyblend, a fine powder of recycled modified plastic, was mixed with bitumen to:
  17. Q17. Which of the following heavy metals is associated with the 'Itai-itai' disease?
  18. Q18. Blue baby syndrome (Methaemoglobinaemia) is caused by the contamination of drinking water with excess:
  19. Q19. The process where a water body dies due to the accumulation of silt and organic debris over thousands of years is called:
  20. Q20. A river with a very high BOD value is likely to be: